/**
 * @author zhoujunjie
 * @desc TODO
 * @date 2025/4/9
 */
public class Test06 {
    public static void main(String[] args) {
        int a = 7;
        int b = 0;
        int day = 0;
        while (b < a) {
            day++;
            b += 3;
            while ( b < a ){
                b -= 2;
                break;
            }
        }
        System.out.println(day);
    }
}
